Science & Technology

Preliminary Release of Microbial and Disinfection Byproduct Data Files (2012-2019) from EPA’s Fourth Six-Year Review Information Collection Request

This page contains the Six-Year Review 4 Microbial and Disinfection Byproduct data files.

Six-Year Review 4 Frequent Questions and Answers

These are frequently asked questions and their answers related to the Six-Year Review 4.

Six-Year Review of Drinking Water Standards

Learn about EPA's process and outcomes for identifying drinking water standards that may need revision to strengthen public health protection or improve efficiency of implementation.

Inspection of a Water Infrastructure Project Funded by the Infrastructure Investment and Jobs Act to Verify Compliance with Federal Domestic Preference Requirements

Project Notification

Recreational Waters Research

EPA conducts research to ensure that beaches, lakes, and other recreational waters are safe for human use from chemical and microbial pathogens.

Onsite Non-Potable Water Reuse Research

EPA's onsite non-potable water reuse research.

Notification: Audit of the EPA’s Innovative Water Infrastructure Workforce Development Program

Kansas City Smelting and Refining Facility on Guinotte Street, Kansas City, Jackson County, Missouri - Fact Sheet, August 2017

EPA Conducting Initial Removal Assessment

Troubleshooting Noncompliance at the Smallest Wastewater Treatment Plants - Part 1 (Ohio's Package Plant Initiative, Nutrient Conversion)

This webinar is intended as training to help NPDES regulated entities and regulators understand additional techniques that can help operators refine their operations, and if needed to help bring them back into compliance.

Lead Exposure Associated with Renovation and Remodeling Activities: Phase III, Wisconsin Childhood Blood-Lead Study

The Childhood Blood-Lead Study was conducted to determine the impact of residential R&R on the blood-level concentrations of children occupying the residences.

CMAQ Publications

Peer-reviewed research that supports or uses CMAQ is documented here.

Workshops to Obtain Input on Preliminary Draft Materials for the Oxides of Nitrogen Integrated Science Assessment

EPA announced a series of public workshops to evaluate preliminary draft materials that will inform the development of the Integrated Science Assessment for oxides of nitrogen.

Research Grant Areas

Overview of EPA's research grant research areas

California Clean Air Technology Initiative (CATI) Projects

EPA Pacific Southwest has provided funding to both South Coast AQMD and San Joaquin Valley APCD to help spur early-stage, innovative technologies that need further testing and demonstration prior to deployment and commercialization.

Water Quality Criteria

EPA develops water quality criteria based on the latest scientific knowledge to protect human health and aquatic life. This information serves as guidance to states and tribes in adopting water quality standards.

Freedom to Fix

In response to a Presidential Directive, EPA has issued guidance reaffirming that the Clean Air Act supports Americans’ Right to Repair their own vehicles and equipment.

Certification and Compliance for Onroad Vehicles and Engines

Certification and compliance information for passenger cars and trucks (light-duty), commercial trucks and buses (heavy-duty), motorcycles (light-duty).

Members of the Science Advisory Committee on Chemicals

See information on the 2026 SACC Members.

Water Quality Standards Regulations: Squaxin Island Tribe

Information related to Water Quality Standards for the Chemehuevi Tribe of the Chemehuevi Reservation.

Water Quality Standards Regulations: Red Lake Band of Chippewa

Information about water quality standards for the Red Lake Band of Chippewa.